Atoms and Nuclei [JEE (Based on NTA Guidelines-IIT Engg.) Advanced Physics]: Questions 1 - 3 of 24

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Question number: 1

» Atoms and Nuclei » Radioactive Decay Law

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Appeared in Year: 2017

MCQ▾

Question

is an isotope of Iodine that decays to an isotope of Xenon with a half – life of days. A small amount of a serum labelled with is injected into the blood of a person. The activity of the amount of injected was . It is known that the injected serum will het distributed uniformly in the blood stream in less than half an hour. After of blood is drawn from the person’s body, and gives an activity of . The total volume of blood in the person’s body, in liters is approximately:

(you may use for and ).

Choices

Choice (4)Response

a.

4

b.

2

c.

3

d.

5

Question number: 2

» Atoms and Nuclei » Binding Energy Per Nucleon

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Appeared in Year: 2009

MCQ▾

Question

The above is a plot of binding energy per nucleon against the nuclear mass ; correspond to different nuclei. Consider four reactions:

Plot of binding energy per nucleon

Plot of Binding Energy Per Nucleon

(i)

(ii)

(iii)

(iv)

Where is the energy released. In which reactions is positive? (AIEEE)

Choices

Choice (4)Response

a.

(ii) and (iii)

b.

(ii) and (iv)

c.

(i) and (iv)

d.

(i) and (iii)

Question number: 3

» Atoms and Nuclei » Energy Levels

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Appeared in Year: 2017

MCQ▾

Question

An electron in a hydrogen atom undergoes a transition from an orbit with quantum number to another with quantum number . and are respectively the initial and final potential energies of the electron. If , then the smallest possible is:

Choices

Choice (4)Response

a.

2

b.

4

c.

5

d.

6

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